diff --git a/djblets/pipeline/settings.py b/djblets/pipeline/settings.py
index cc0e7feeb3307c701b699220d4e10144b6dd5101..678f5c674685ecdeed4ba2cfba58a65cd59157dc 100644
--- a/djblets/pipeline/settings.py
+++ b/djblets/pipeline/settings.py
@@ -195,7 +195,7 @@ def build_pipeline_settings(
         config.update({
             'LESS_BINARY': lessc_bin_path,
             'LESS_ARGUMENTS': [
-                '--include-path=%s' % static_root,
+                '--include-path=%s:%s' % (static_root, node_modules_path),
                 '--no-color',
                 '--source-map',
                 '--js',